Blasting-cartridge



ma Model.) n

- P. A. GLHTER.

BLASTING MRTMIDGEg m 55mm.' miem@ Dem 17, 1895, A

UNITED STATEs PATENT @ENCEs v PAUL AMBROSE OLIVER, OF OLIVERS MILLS, 'PENNSYLVALL BLASTING-CARTRIDGE.

SPECIFICATION forming part of Iaetters Patent No. 551,600, dated December 17, 1895.

Application tled- January 19, 1895. Serial No. 535 ,484. (No model.)

To all whom it may concern.-

Beit known that l, PAUL AMBnosn OLI- VER, a citizen of the United States, residing at Olivers Mills, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Blasting Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to blasting devices; and it consists in the novel construction and combination of the parts, and in the method, hereinafter fully described and claimed, which enables blasting to be performed in the presence of inflammable gas without ignitingthe same'.

The drawing shows a longitudinal section through a vcartridge and its cap or primer construetedy according to this invention.

A is an autel-.inclosing cartridge-case ot any approved material. rlhis case is filled with a nameless explos fve compound B, preferably the kind commercially known as nameless dynamite!7 This nameless explosive coinpound acks in a small space, takes up less room than ordinary black blasting-powder, is a high exnlosii e, and is set oit by means ot' a cap or primer` This nameless explosive compound when exploded will not ignite the gas in a coal-mine, or air mixed with nre-damp r coal-dust, but as it requires a powerful cap to set it on' it also becomes necessary that the cap itself should produce no name, as otherwise the name of the cap bursting through the blasting-charge would ignite the gas in the mine.

C is a metallic cap containing any app1ovec`i,detonating compound or fulminate. p

#nach as the tulminate of mercury c.

l) isa fuse inserted in the end of the cap G. AThis fuse is preferably an electric fuse consisting of two insulated wires.

E is a case secured to the cap Gand surrounding it, and e is a name-extinguishing substance in the form of a dry powder, such as borax and bicarbonate of soda or alum and borax, contained in the-ease E, surrounding the cap, and interposed between the cap and the nameless explosive compound l5.

The `Front end of the ease E is preferably pointed to enable it to be thrust into the compound B, but it is not necessarilypointed, as .the ca-se may be packed in with the nameless explosive compound in a bore-hole, or it maybe placed upon a rock and covered with the nameless explosive compound and an outer layer-of clay.

The ends'ot the ease 'E and the cap C are 'plugged upin any approved manner, such as,

for instance, with melted sulphur.

1. The combination, with anouter eartridge case containing a nameless explosive compound, ot a detonating cap provided with a fuse, and a ease containing a name extinguishin g substance, encirolin g the said cap and interposed between it and the nameless explosive compound, substantially as set forth.

2. The combination, with a blasting charge consisting of a nameless explosivecompound,

of a detonating cap embedded in the said.

PAUL ll'lBROSE OLIVER.

lVitnes/ses: y y

FRED. SCHNEIDER, lVM. MACDONALD. 

